Adjustable printing hammer



Oct. 27, 1953 F. R. WERNER 2,656,788

ADJUSTABLE PRINTING HAMMER Original Filed Nov. 5, 1948 FIG. 3

11 ZA-UU475 1475 13 "M59 Ii tam-004. 5 I475 HB mm I476 010- 5320 1417 ale-000,75 476 INVENTOR 7 BY wafiugn HIS ATTORNEYS Patented Oct. 27, 1953 ADJUSTABLE PRINTING HAMIHER Frank R. Werner, Dayton, Ohio, assignor to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland Original application November 3, 1948, Serial No.

58,114. Divided and this application September 1, 1951, Serial No. 244,768

8 Claims.

This application is a division of application Serial No. 58,114, filed November 3, 1948.

The invention relates to improvements in printing mechanisms for cash registers, calculating machines, and the like.

The principal object of the invention is to pro vide an improved printing mechanism for cash registers and calculating machines.

A specific object of the invention is to provide a means for adjusting the pressure of a printing hammer on the type carriers, to vary the impact of the hammer against the type carriers.

With these and incidental objects in view, the invention includes certain novel features of construction and combinations of parts, a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings:

Fig. 1 is a detail view of the adjustable roller for the slip printing hammer.

Fig. 2 is a detail side elevation of the slip printing hammer mechanism.

Fig. 3 is a facsimile of an insertable sales slip upon which printed records are made by the machine.

Fig. 4 is a detail view showing the audit tape feeding and printing mechanism.

Fig. 5 is a top plan view of the audit tape printing mechanism shown in Fig. 4.

Fig. 6 is a detail View of the audit tape printing hammer taken on lines 6--6 of Fig. 7.

Fig. '7 is a sectional view taken on lines 1-'! of Fig. 4.

Fig. 8 is a facsimile of a part of the audit tape.

GENERAL DESCRIPTION The machine to which the present invention is applied is illustrated in connection with the machine shown and described in United States Patent No. 2,209,763, issued to Ernst Breitling on July 30, 1940.

The invention embodies a, novel slip-printing mechanism in which impressions are made on an insertable slip, which is supported in a suitable supporting means in the machine. The printer is arranged to print in duplicate on the insertable slip, and a feeding mechanism is provided to space the insertable slip after the first impression has been made. A novel adjustable roller is provided on the printing hammer, so that the pressure exerted on the type carriers can be varied to obtain an impression which is neither too light nor too heavy. The novel adjustable roller is acted upon by a cam, and the 2 roller itself is tapered, so that the roller may be adjusted longitudinally on its support to present varying diameters thereof to the operating cam by sliding the roller longitudinally on its support. A smaller or greater diameter, as necessary, may be presented to the cam to vary the impact of the printing hammer against the type carriers. The machine is also provided with an audit tape printing mechanism in which the printing hammer operating mechanism can also be adjusted for varying the impact of the hammer against the type carriers by longitudinally adjusting a tapered roller on the printing hammer for the audit tape printer.

DETAILED DESCRIPTION The machine disclosed in said patent, to which this present invention is shown applied, is provided with a series of setting levers operatively' comiected to means by which type carriers 56 and E6. on shafts 51 and 6|, respectively, are positioned commensurate with the setting of the levers. For further details of these connections. reference may be had to the above-mentioned parent case.

Slip-printing mechanism The machine is provided with mechanism to print on an insertable slip, illustrated in Fig. 3. To provide a support for the slip in the machine, a supporting table 92 (Fig. 2) is provided, which projects through a slot in the cabinet of the machine. The table 92 is suitably mounted on brackets in the machine to guide and support the insertable slip in proper alinement with type wheels and the printing hammer.

Slip-printing hammer mechanism The slip-printing hammer mechanism is illustrated in Figs. 1 and 2. The slip-printing hammer 93 (Fig. 2) is pivotally mounted on a stud =94, carried between the left side frame 58 (Fig. 5) of the machine and an auxiliary frame (not shown). The hammer 93 is provided with a platen 96, carried by a channel bar 91 supported on the hammer 93. The hammer 93 comprises two arms and a connecting bar, as clearly illustrated in Fig. 1.

Carried between the two arms of the hammer '93 is a shaft 98, provided with a plurality of annular grooves 99. A clip I99 may be inserted into any one of the annular grooves 99 to form a stop for locating a tapered roller I0 I. A washer I92 is mounted on the shaft 98 adjacent the right end of the tapered roller llll. A spring I03, having its right end bearing against one of the which a clip I01 is inserted to'limit the leftward movement of the shaft 98 (Fig. 1) under action of the spring I93. The tapered roller IOI is adjustably mounted on the shaft 99 for a purpose to be presently described.

Mounted on a shaft I08 is a cam I09,

IOI. The shaft I08 and the cam I09 are rotated counter-clockwise once during each machine operation by any desired means. Counter-clock- Wise rotation of the shaft I08 (Fig. 2) causes the cam [09 to engage the tapered roller IM and thereby rock the printing hammer 93 to impinge the record materialand a ribbon against the type carriers 56 on shaft 51, to take an impression on the .insertable slip (Fig. 3). After the first impression has been made, a feeding mechanism (not shown) line-spaces the insertable slip, whereupon the second node of the cam I09 rocks the hammer to impinge the record material and the ribbon against the type carriers.

From an inspection of Fig. 1, it is seen that, if the tapered roller IN is adjusted longitudinally, a smaller or greater diameter of the roller I I will comeinto the, path of the node of the cam I 99. If the impression'being made is too heavy, the tapered roller is shifted to the left (Fig. 1) to present a smaller diameter of the roller to the cam I09 to move the hammer farther from the type carriers- If, On the other hand, the impression is :too light, the tapered roller [BI is adjusted to thei ight to bring a larger diameter of the tapered roller in to the path of the cam I09 thus moving the hammer nearer the type carriers. By the novel tapered roller HH and the means for adjusting it in relation to the cam I09, an impressioncanbeobtained which is legible and not too light or not too heavy.

Irrorder to hold the printing hammer 93 inits normal position when the machine is at rest, to prevent accidental or fraudulent operation of said The notch I a The right -end of the having two nodes for cooperation with the tapered roller printing hammer, a cam I I3 is secured on a shaft 3I. When the machine is at rest, the node of the cam H3 is engaged by a roller II I, mounted on an arm I.I5, secured to the hammer 93. When the machine is at rest, the hammer 93 is locked in its home position, since it is impinged between the roller IOI and the roller I I4 and therefore cannot-be moved either accidentally or fraudulently.

Audit tape printing mechanism furcated at their left ends to straddle and slide on ,a shaft 203. .A spring 20 1 (Figs. 4 and 5), stretchedbetween astud on the hammer 200 and a stud205 onthe printer front frame 95, normally maintains theahammer .200 in the leftward posi- 4 tion, where a roller 201, described hereinafter, is held in engagement with a cam 208.

Supported in the arms 20I and 202 of the printing hammer 200 is a stud 206. Rotatably and slidably mounted on the stud 20B is the tapered roller 201, lying in the plane of movement of a cam 208, secured to the before-mentioned shaft 203. Secured to the shaft 203 is a gear 209 (Figs. 4 and 5), which meshes with a gear I92 rotatably mounted on a stud I96. The gear I92 is rotated by the main shaft 3| through gears I I6 and III,

the latter being mounted on a stud I20.

When themachine is operated and the shaft 3| his rotatedcounter-clockwise (Fig. 4), the gear I92 is rotatedlikewise through the intermediate gear 'III," thus rotating the gear 209 clockwise to rotate the .cam2-09likewise. Rotation of the cam 208, coacting with the tapered roller 201, slides the printing hammer 200 to the right to impinge the audit tape and the ribbon against the type carrier BO tomake an impression on the audit tape I60 (Fig.8).

The roller 20? is slidably mounted on the stud 20.9 to provide an adjustment for controlling the density of the impression made on the audit tape. Coacting with the tapered roller 20'! is a spool 2;I9,,which is threaded to receive a screw 2, carried by the hammer arms 20I and 202. A spring 2I2, one end bearing against the head of the screw 2I I, and the other end bearing against a countersunk opening in the arm 202, maintains the screw 2H in its leftward position to take up any slack in the screw threads on the screw 2 and those in the inner opening of the spool 2I0.

By turning the screw 2I I in one direction or the other, the tapered roller can be adjusted longitudinallyon the stud 206 to position various diameters of the tapered roller into the path of the cam'208 to control the extent of movement of the printing hammer 290 to thereby control the density of the printing on the audit tape. If the impression is too light, the tapered roller is shifted to the left (Fig. 7) to present a greater diameter to the cam 268, to move the hammer nearer to the type carriers to make the impression heavier. If the impression is too heavy, the tapered roller 20'! is moved to the right (Fig. '7) to present a. smaller diameter of the tapered roller 201 to the cam 208 to move the hammer away from the type carriers.

While the forms of mechanisms shown and described herein is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the in vention to the forms or embodiments disclosed herein, for it is susceptible of embodiment in various other forms.

What is claimed is:

1. "In a machine of the class described, the combinationof type carriers, a printing hammer for taking impressions from the type carriers, a cam to actuate the printing hammer, a taperedr oller aqiustab y ount on th h m n a t with'the camwhereby the cam actuates the printing hammer,said roller adjustable longitudinally on the printing hammer to select a section of the tapered roller for coaction with the cam whereby the hammer is adjusted in respect to the type care riers to vary the degree of impact of the hammer againstthe type carriers when the hammer is actuated by the cam, and resilient means to maintain the roller in contact with the cam at .a ti

2. II1 a .machine of the class described, the

c bination of typ earrieraa printing hammer for taking impressions from the type carriers, a cam to actuate the printing hammer, a bracket fixedly mounted on the hammer, a tapered roller coacting with the cam and longitudinally adjustable in the bracket to vary the effective diameter of the tapered roller for coacting with the cam whereby the hammer can be adjusted in relation to the type carriers to vary the pressure exerted on the printing hammer when the hammer is actuated by the cam, and means to maintain the roller in fixed relation with the cam.

3. In a machine of the class described, the combination of type carriers, a printing hammer for taking impressions from the type carriers, a cam to actuate the printing hammer, a bracket fixedly mounted on the hammer, a shaft carried by the bracket, a tapered roller coacting with the cam and longitudinally adjustable on the shaft to vary the diameter of the tapered roller coacting with the cam to adjust the hammer in respect g to the type carriers to control the pressure of the hammer against the type carriers when the cam actuates the hammer, and a spring to maintain the roller in contact with the cam.

4. In a machine of the class described, the combination of type carriers, a printing hammer for taking impressions from the type carriers, a cam to actuate the printing hammer, a bracket fixedly mounted on the hammer, a shaft carried by the bracket, a plurality of annular grooves in the shaft, a clip selectively engageable with any one of the annular grooves, a tapered roller coacting with the cam and slidably mounted on the shaft to vary the effective diameter of the tapered roller in respect to the cam to adjust the hammer in respect to the type carriers to control the pressure exerted by the hammer against the type carriers, means to maintain the tapered roller in engagement with the clip to thereby hold the tapered roller in a selected longitudinal position, and means to maintain the roller in engagement with the cam at all times.

5. In a machine of the class described, the combination of type carriers, a printing hammer for taking impressions from the type carriers, a cam to actuate the printing hammer, a bracket fixedly mounted on the hammer, a shaft carried by the bracket, a plurality of annular grooves in the shaft, a clip selectively engageable with any one of the annular grooves, a tapered roller coacting with the cam and mounted on the shaft to adjust the hammer in respect to the type carriers to vary the effective diameter of the tapered roller in respect to the cam to vary the amount of pressure exerted on the type carrier, a spring engageable with one end of the tapered roller to impinge the opposite end of the roller against the clip to thereby maintain the tapered roller in any one of the selected longitudinal positions, and means to maintain the roller in contact with the cam irrespective of the longitudinal adjustment of the roller.

6. In a machine of the class described, the combination of type carriers, a printing hammer to take impressions from the type carriers, a shaft supported by the printing hammer, a tapered roller longitudinally adjustable on said shaft, an adjusting collar having flanges embracing said tapered roller at each end, said collar being threaded through the center thereof, a screw carried by said hammer, and having the threads thereof coacting with the threads of said collar, whereby the collar can be adjusted longitudinally to adjust the tapered roller longitudinally on said shaft, a cam to engage said roller in any adjusted position of the latter to actuate the printing hammer, said adjustable tapered roller providing a means to adjust the hammer in respect to the type carriers to vary the pressure of the printing hammer against the type carriers, and means to hold the roller in contact with the cam at all times.

'7. In a machine of the class described, the combination of type carriers, a printing hammer to take impressions from the type carriers, a shaft supported by the printing hammer, a tapered reller longitudinally adjustable on said shaft, an adjusting collar having flanges embracing said tapered roller at each end, said collar being threaded through the center thereof, a screw carried by said hammer and having the threads thereof coacting with the threads of said collar whereby the collar can be adjusted longitudinally to adjust the tapered roller longitudinally on said shaft, a cam to engage said roller in any adjusted position of the latter to actuate the printing hammer, said adjustable tapered roller providing a means to adjust the hammer in respect to the type carriers to vary the pressure of the printing hammer against the type carriers by varying the effective diameter of the roller with which the cam engages, a resilient means to maintain the screw in adjusted position, and means to maintain the roller in contact with the earn.

8. In a machine of the class described, the combination of type carriers, a printing hammer to take impressions from the type carriers, a shaft supported by the printing hammer, a tapered roller longitudinally adjustable on said shaft, an adjusting collar having flanges embracing said tapered roller at each end, said collar being threaded through the center thereof, a screw carried by said hammer and having the threads thereof coacting with the threads of said collar, whereby the collar can be adjusted longitudinally to adjust the tapered roller longitudinally on said shaft, a cam to engage said roller in any adjusted position of the latter to actuate the printing hammer, said adjustable tapered roller providing a means to adjust the hammer respect to the type carriers to vary the pressure of the printing hammer against the type carriers, a flange on one end of the shaft, a shoulder on the screw located adjacent said flange so as to be engageable therewith, a spring to maintain the shoulder of the screw in engagement with the flange on the shaft whereby the tapered roller is held in adjusted position, and means to maintain the roller in contact with the cam.

FRANK R. WERNER.

References Cited in the file of this patent UNITED STATES PATENTS Number 

